錘桿環 的英文怎麼說
中文拼音 [chuígǎnhuán]
錘桿環
英文
hammer ring-
Items found nearby a lead - - used for depth sounding, a ring for aftaching sails to a mast, and copper nails - - could have belonged to other ships
在附近找到的一些小物件? ?用於測量水深的測深錘，把帆繫到桅桿上的環圈和銅釘? ?可能屬于其它船隻。Under the function of big pressure and dynamic load, the grains may be moved which may cause the soil body distortion. at present, the relatively ripe methods of drill in gravel layer are mostly double - wall drill pipe reverse circulation drilling, auger stem breast wall drilling and down - the - hole hammer follow down drilling
論文根據jsl ? 30型礫石鉆機潛孔錘同心跟管鉆具結構，採用程序計算得到了鉆桿內各深度處壓力分佈、鉆頭壓力降、環形空間壓力分佈及空氣流速分佈。
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